Steam-jet pump



(ModeL) J. A.MAR$H.

STEAM JET PUMP No. 334,597. Patented Jan. 19, 1886.v

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km @WMJZ N. PETERS. Pholo-Lillwgraphur. Wnhm im, D.C.

' The castingJ has ascrew-socket, K, into which UNITED STATES PATENTOFFICE.

JOHN A. MARSH, OF LONG LAKE, ILLINOIS.

STEAM-J ET PUMP.

SPECIFICATION forming part of Letters Patent No. 334,597, dated January19, 1886. I

Application filed March 30, 1885.

To all whom it may concern Be it known that I. JOHN A. MARSH, of LongLake, Madison county, State of Illinois, have invented a certain new anduseful Improvement in Steam-Jet Pumps, of which the following is a full,clear, and exact description, reference being had to the accompanyingdrawings, forming part of this specification.

Figure 1 is a side view of the improvement. Fig. 2 is part in side viewand part in axial section. Fig. 3 is an axial section. Fig. 4 is atransverse section at 4 4, Fig. 2.

A- is the suction-pipe. B is the dischargepipe. These may be bent orconnected with other pipes or appendages in any suitable manner.

O is the steam-pipe, which is branched at c c, and connects with twoannular steam-chambers, D and E.

The case consists of three castings connected together by their flangesF, G, and H, secured together by bolts 1. The flangejoints are madetight by rubber or other gaskets.

theend of the suction-pipe A is screwed, and both it and the middlecasting, L, have a bore of. the same diameter as the inside of thesuction and discharge pipes A and B. The casting J has a taperingjet-nozzle, M, fitting in a flaring socket, N, of the casting L. In thecircumference of the nozzle M are a number of inclined grooves, m,through which the steam from the chamber D passes into the bore with aspiral movement, so that its centrifugal force will tend to make it hugthe Serial No. 160,621. (ModeL) outside of the bore and prevent in agreat degree the friction of the water against the sides of the bore.These jet-passages m are shown as about semicircular in section; but Ido not confine myself to this shape. I have shown the passages asvarying about twenty degrees from a line parallel with the axis as totheir spiral direction. It will be seen that they must also inclinetoward the axis of the bore, as they lead from an annular chambersurrounding the bore; but their spiral inclination is sufficient tocarry the steam to the outside of the bore, (as before explained.) Thenozzle or end M of the casting L is similar to that M of casting J, andhas similar grooves for the passage of steam, these grooves being markedm. The nozzle or end M fits in the socket N of the casting 0, into whichthe discharge-pipe B is screwed.

It will be seen that as the bore is of equal diameter in thesupply-pipe, the pump, and the discharge-pipe, there is no possibilityof the pump getting clogged. as any object entering the supply-pipewould pass through without obstruction.

I claim as my invention A steam-jet pump having a uniform borethroughout, surrounded by one or more annular steam-chambers. withseries of jet-passages leading from said chamber or chambers to thebore.

JOHN A. MARSH.

In presence of- BENJN. A. KNIGHT, GEORGE D. KNIGHT.

